Impeller of fuel pump for vehicle

Abstract

Provided is an impeller of a fuel pump for a vehicle. More particularly, an impeller of a fuel pump for a vehicle, which can improve delivery pressure and a delivery speed of fuel by modifying a shape of an impeller blade that is provided between an upper casing and a lower casing of a fuel pump and is joined to a rotational shaft of a driving motor to deliver fuel by using rotational force at the time of suctioning fuel from a fuel tank and supplying fuel to an engine of an internal combustion engine.

What is claimed is: 
     
       1. An impeller of a fuel pump for a vehicle, comprising:
 an impeller body having a disk shape and including a top surface, a bottom surface opposite to the top surface, and an outer circumferential surface in-between; 
 a circumference center guider formed on the outer circumferential surface, the circumference center guider protruding along a center of the outer circumferential surface, wherein a shaft fixation hole penetrates at a center of the top surface and the bottom surface, and a rotation shaft of a driving motor is inserted into and joined with the shaft fixation hole; 
 a plurality of blades formed on the outer circumferential surface of the impeller body at predetermined intervals and protruding in a radial direction from the outer circumferential surface; and 
 a blade center guider formed on an impeller rotation direction surface of each of the blades in a radial direction and protruding circumferentially to a peak at the center of the impeller rotation direction surface, an edge at which a surface of the blade center guider and a surface of the blade contact each other being rounded, 
 wherein the circumference center guider and the blade center guider are connected with each other, and an edge at which the blade center guider and the circumference center guider are connected is rounded. 
 
     
     
       2. The impeller of a fuel pump for a vehicle of  claim 1 , further comprising a side ring formed along an outer circumferential surface of the plurality of the blades so as to form a blade chamber between two neighboring blades allowing fuel to be discharged and introduced through the blade chamber.